energy
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energy
In physics, the ability to do work. In everyday language, often used as a synonym for electricity, heat, or fuel.
Wir müssen Energie sparen, um die Kosten zu senken und die Umwelt zu schützen.
We need to save energy in order to reduce costs and protect the environment.
energy
The personal physical or mental strength, drive, and stamina to be active and do things.
Nach dem Urlaub hatte sie wieder viel Energie für neue Aufgaben.
After the vacation, she had a lot of energy again for new tasks.
You can tell from context whether physical or personal energy is meant. Technical or economic topics like 'Kosten' (costs), 'sparen' (to save), or 'erneuerbar' (renewable) point to the first meaning, while personal topics like 'Müdigkeit' (tiredness) or 'Motivation' (motivation) point to the second.
Die Fabrik benötigt viel elektrische Energie.
The factory needs a lot of electrical energy.
In technical and physical contexts, 'Energie' (energy) is often combined with verbs like 'sparen' (to save), 'verbrauchen' (to consume), 'erzeugen' (to generate), or 'liefern' (to supply).
Moderne Kühlschränke verbrauchen deutlich weniger Energie als alte Modelle.
Modern refrigerators use significantly less energy than old models.
The word 'Energie' (energy) is a central part of the very common term 'erneuerbare Energien' (renewable energies), which refers to environmentally friendly energy sources such as sun, wind, and water.
Der Ausbau erneuerbarer Energien ist ein wichtiges politisches Ziel.
The expansion of renewable energies is an important political goal.
When it comes to personal strength, 'Energie' (energy) is often used in fixed expressions. Typical ones are: 'Energie tanken' (to recharge one's batteries), 'voller Energie sein' (to be full of energy), or 'seine Energie in etwas stecken' (to put one's energy into something).
Nach einem langen Spaziergang fühle ich mich wieder voller Energie.
After a long walk, I feel full of energy again.
strength / force
Both Kraft and Energie can refer to a person's ability to be active and get things done. Kraft tends to emphasize strength and the ability to exert oneself directly, while Energie focuses more on drive and stamina. Kraft is appropriate when talking about physical strength; Energie often fits better when referring to sustained activity or motivation.
Nach dem langen Anstieg hatte sie noch genug Energie, um weiterzugehen und das Ziel zu erreichen.
After the long climb, she still had enough energy to keep going and reach the destination.
Nach dem langen Anstieg hatte sie noch genug Kraft, um den schweren Rucksack zu tragen.
After the long climb, she still had enough strength to carry the heavy backpack.
